Question...what is the normal running temp for a 1972 340

1968FormulaS340 said
You do not need a fan or shroud at 65 mph so it's not the fan. At 65 mph air is being rammed through that radiator just from the car traveling through the atmosphere.

If the air is going around the radiator instead of through it....

Yes, they have a good point that your radiator is capable of cooling the engine at slower speeds, just not at highway speeds.